By Jonathan Moreland, founder of InsiderInsights.com and author of Profit From Legal Insider Trading.

NEW YORK ( TheStreet) -- Which insiders are selling and buying chunks of stocks?

Below are lists of the top 10 open-market insider purchases and sales filed at the Securities and Exchange Commission Thursday, February 24, 2011 as ranked by dollar value. Company executives and directors are in the best position to assess the attractiveness of their firms' shares, and here is how many of them are voting their wallets! Please note, however, that these are factual lists, not buy and sell recommendations. Dollar value is only one metric to assess the importance of an insider transaction.

Martek Biosciences (MATK) Royal Dsm NV BO 524,668 $16,527,042
Everest Re Group (RE) Everest Reinsurance BO 104,500 $9,185,484
Hain Celestial (HAIN) Icahn Carl C BO 26,400 $795,283
Contango Ore (CTGO) Gillen Donald BO 16,137 $274,329
Coca Cola (KO) Greenberg Evan G DIR 3,896 $249,995
Scana (SCG) Marsh Kevin B PR,COO
DIR
4,971 $200,180
Baldwin & Lyons (BWINB) Weil John D DIR,BO 7,308 $174,511
Star Gas Partners (SGU) Lubar Sheldon B DIR 29,151 $158,030
Royce Focus Trust (FUND) George W Whitney VP,FO
BO
20,000 $157,400
Epicor Software (EPIC) Pickup Richard H DIR 15,000 $152,150
Source: www.InsiderInsights.com
Valmont Industries (VMI) Robert B Daugherty Rev Tr BO 304,800 $31,933,132
Google (GOOG) Schmidt Eric E CEO,CB
DIR
44,557 $27,449,277
TD Ameritrade (AMTD) TD Luxembourg Intl BO 896,786 $18,887,672
Acme Packet (APKT) Ory Andrew D PR,CEO
DIR
70,000 $4,846,370
Perrigo (PRGO) Arkin Moshe DIR 56,126 $4,189,471
Chemed (CHE) Hutton Thomas C VP,DIR 41,000 $2,665,000
Pioneer Natural Resources (PXD) Cheatwood Chris J VP,TO 25,264 $2,546,847
Campbell Soup (CPB) Weber Charlotte C DIR 75,000 $2,535,000
Basic Energy Services (BAS) Huseman Kenneth V PR,CEO
DIR
128,700 $2,411,052
EMC (EMC) Coviello Arthur W Jr CB 75,000 $1,989,518
Source: www.InsiderInsights.com

Key to Titles: A=Assistant, AI=Affiliated Investor, AO=Accounting Officer, BD=Business Development, BO=Beneficial Owner, CAO=Chief Accounting Officer, CB=Chairman, CCO=Chief Compliance Officer, CEO=Chief Executive Officer, CFO=Chief Financial Officer, CIO=Chief Information Officer, CO=Compliance Officer, COO=Chief Operating Officer, CT=Controller, CTO=Chief Technology Officer, DIR=Director, EVP=Executive Vice President, F=Founder, FO=Financial Officer, GC=General Counsel, HR=Human Resources, IO=Information Officer, IR=Investor Relations, LO=Legal Officer, MD=Managing Director, O=Officer, OO=Operating Officer, PR=President, PT=Partner, REL=Relative of an insider, SEC=Secretary, SH=Shareholder, SO=Sales Officer, TO=Technology Officer, TR=Treasurer, TT=Trustee, VCB=Vice Chairman, VP=Vice President, X=Ex Officer or other title displayed.
Jonathan Moreland is the founder of InsiderInsights.com, which produces a weekly newsletter and offers professional screening and alerting tools to analyze a proprietary, real-time insider data feed. He is also the principal of Insider Asset Management, a registered investment advisor in New York. Mr. Moreland has been analyzing insider data professionally for two decades and has been a contributor to TheStreet.com since 2001. A fundamental analyst with an MBA in finance, Mr. Moreland long ago identified insider data as an excellent first screen to determine where to focus his research efforts. He is quoted frequently in the media for his insider analysis and stock recommendations stemming from it. He is also author of Profit From Legal Insider Trading.

Under no circumstances does the information in this column represent a recommendation to buy or sell stocks. While he cannot provide investment advice or recommendations, Moreland appreciates your feedback; click here to send him an email.